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Optical spectroscopy in CoO: Phononic, electric, and magnetic excitation spectrum within the charge-transfer gap

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dc.contributor.author Kant C.
dc.contributor.author Rudolf T.
dc.contributor.author Schrettle F.
dc.contributor.author Mayr F.
dc.contributor.author Deisenhofer J.
dc.contributor.author Lunkenheimer P.
dc.contributor.author Eremin M.
dc.contributor.author Loidl A.
dc.date.accessioned 2018-09-18T20:20:50Z
dc.date.available 2018-09-18T20:20:50Z
dc.date.issued 2008
dc.identifier.issn 1098-0121
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/138939
dc.description.abstract The reflectivity of single-crystalline CoO has been studied by optical spectroscopy for wave numbers ranging from 100 to 28 cm-1 and for temperatures 8<T<325 K. A splitting of the cubic IR-active phonon mode on passing the antiferromagnetic phase transition at TN =289 K has been observed. At low temperatures the splitting amounts to 15.0 cm-1. In addition, we studied the splitting of the cubic crystal-field ground state of the Co2+ ions due to spin-orbit coupling, a tetragonal crystal field, and exchange interaction. Below TN, magnetic-dipole transitions between the exchange-split levels are identified, and the energy-level scheme can be well described with a spin-orbit coupling λ=151.1 cm-1, an exchange constant J=17.5 cm-1, and a tetragonal crystal-field parameter D=-47.8 cm-1. Already in the paramagnetic state electric-quadrupole transitions between the spin-orbit split level have been observed. At high frequencies, two electronic levels of the crystal-field-split d manifold were identified at 8 000 and 18 500 cm-1. © 2008 The American Physical Society.
dc.relation.ispartofseries Physical Review B - Condensed Matter and Materials Physics
dc.title Optical spectroscopy in CoO: Phononic, electric, and magnetic excitation spectrum within the charge-transfer gap
dc.type Article
dc.relation.ispartofseries-issue 24
dc.relation.ispartofseries-volume 78
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS10980121-2008-78-24-SID57749091714


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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